<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <!-- 引入Vue -->
  <script type="text/javascript" src="../js/vue.js"></script>
  <style>
    * {
      margin-top: 20px;
    }

    .demo1 {
      height: 50px;
      background-color: skyblue;
    }

    .box1 {
      padding: 5px;
      background-color: skyblue;
    }

    .box2 {
      padding: 5px;
      background-color: #bfa;
    }

    .list {
      width: 200px;
      height: 200px;
      background-color: paleturquoise;
      overflow: auto;
    }

    li {
      height: 100px;
    }
  </style>
</head>

<body>
  <!-- 准备好一个容器 -->
  <div id="root">
    <h2>欢迎来到{{name}}</h2>
    <!-- 阻止默认事件(常用) -->
    <a href="http://www.jd.com" @click.prevent="showInfo">点我</a>
    <!-- 阻止事件冒泡(常用) -->
    <div class="demo1" @click="showInfo">
      <button @click.stop="showInfo">点我提示信息</button>
    </div>
    <!-- 事件只触发一次(常用) -->
    <button @click.once="showInfo">点我提示信息</button>
    <!-- 使用事件的捕获模式 -->
    <div class="box1" @click.capture="showMsg(1)">
      div1
      <div class="box2" @click="showMsg(2)">
        div2
      </div>
    </div>
    <!-- 只有event.target是当前操作的元素时才触发事件 -->
    <div class="demo1" @click.self="showInfo">
      <button @click="showInfo">点我提示信息</button>
    </div>
    <!-- 事件的默认行为立即执行，无需等待事件回调执行完毕 -->
    <ul @wheel.passive="demo" class="list">
      <li>1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
    </ul>
  </div>
</body>

<script type="text/javascript">

  new Vue({
    el: '#root',
    data: {
      name: '尚硅谷'
    },
    methods: {
      showInfo(e) {
        // alert('欢迎来到京东')
        console.log(e.target);
      },
      showMsg(msg) {
        console.log(msg);
      },
      demo() {
        for (let i = 0; i < 100; i++) {
          console.log('#');
        }
        console.log('好累');
      }
    },
  })
</script>

</html>